Door-lock.



F. SOLYWODA.

` DOOR LOCK. APPLICATION FILED AUG. s, 1909.

A Patented Apr.5,1910`.

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DOOR LOCK.

APPLxoATIoN rLED we s, 1909.

A Patented Apn, 1910.

2SHEETS-SHEET Z.

FRANK SOLYWODA, OF TORRINGTON, CONNECTICUT.

DOOR-LOCK.

Specification of Letters Patent.

Patented Apr. 5, 1910..

Application filed August 9, 1909. Serial No. 512,042.

To all whom it may concern:

Be it known that I, FRANK SoLYwoDA, a citizen of the United States,residing at Torrington, in the county of Litchfield and State ofConnecticut, have invented certain new and useful Improvements in Door-Locks; and I do declare the following to be a full, clear, and exactdescription of the invention, such .as will enable Othersskilled in theart to which it appertains to make and use the same.

This invention relates to new and useful improvements in door locks andhas for its object to provide a lock of this kind which can only beopened by the use of two keys and which will be proof against burglars.

The further object of the invention is to provide means for locking theknob latch as well as the locking bolt so that even were the person,surreptitiously attempting to enter the house, successful in unlockingthe locking bolt, the door could not be opened because of the knoblatch.

With the foregoing and other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts, as will be more fully described and particularly pointed out inthe appended claim.

In the accompanying drawings, Figure 1 is an inside elevation of a lockembodying my improvements; Fig. 2 is an outside elevation thereof; Fig.3 1s a similar view with the inside cover plate removed to disclose thelocking mechanism; Fig. 4 is an outer end view; Figs. 5 and 6 aretransverse sectional views taken on line 5-5 and 6 6, respectively, ofFig. 3; Fig. 7 is a horizontal sectional view taken on line 7-7 of Fig.3.

Referring to the drawings for a more particular description of theinvention, 1 and 2 indicate the inside and outside cover plates, 3 thelocking bolt, 4 the knob and 5 the knob latch. The locking bolt isadapted for longitudinal movement through a corresponding guide aperture6 in the end wall`7 of the casing and is further guided in its movementby means of a stud 8 passing through a longitudinal slot 9 in the latchbody 10. The inner end of the latch body is provided with a cylindricalstem 11 which works through a guide lug 12 formed on the outer coverplate 2 of the casing, a coiled spring 13 being disposed around the stemof the locking bolt between the inner end of its body 10 and the bearinglug 12 to normally hold the locking bolt in extended or lockingposition. The locking bolt is further held in locking position by meansof a locking device 14 comprising an approximately square body1 15,having a depending pin or portion 16 which is adapted to enter or seatin a corresponding socket 17 formed in the upper edge and outer end ofthe locking bolt body. The upper edge of said locking device is providedwith a vertical guide pin 1S which works through the bearing lug 19projecting laterally from the outer cover plate of the casing, `a coiledspring 2O being disposed around the guide pin to normally hold thelocking device in projected position. The body of the locking bolt isalso provided with a second socket 21 which is spaced outwardly a shortdistance from the socket 17 and which is adapted to receive the pin orportion 16 of the locking device, when the locking bolt is retracted.The lowei edge of the locking bolt body is recessed as at' 22 to receivethe bit of a key, while the outside and the inside cover plates areprovided with suitable key holes 23 and 24, respectively. The knob latchis arranged to slide longitudinally through the end wall 7 of the casingand is guided in its movement by the stud 25 passing through alongitudinal slot 26 in the body 27 thereof. The body of the latch isalso provided at its inner end with a cylindrical stem 28 which worksthrough guide pin 36 which passes through a slot 37 formed in the body38 thereof. The locking device also comprises the stem engaging portion39 and the lateral projection 40 which is recessed in its outer edge asat 41 to receive the bit of a key, while the inside cover plate l isprovided with a suitable key hole 42 to receive the key. A coiled spring43 is disposed around the guide pin 36 and is arranged to bear on theslotted body of the locking device and holds the latter in either of itstwo positions.

To lock the door, a key is inserted through a suitable key hole ineither the inside or outside cover plate and is turned to cause the bitthereof to engage the portion 16 of the locking device 14 which raisesthe pin or portion 16 thereof out of the socket 2l When the locking boltis moved into locking position by the spring 13. When said bolt is inthis position, the pin 16, of the locking device 14 drops in the outersocket 17 and holds said bolt in position. To unlock the bolt, it isnecessary that tivo keys be used, one to disengage the pin or portion 16of the locking device 14 with the socket 17 of the lock body and theother to engage the recessed portion 99 of said body and to move thesame into retracted position When lthe locking device engages the socket21 and holds the locking bolt retracted. rlhe knob latch may be lockedby moving the locking device by means of the key into position for thestem engaging portion thereof to engage the stem of said latch.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood Without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to Without departing from the principle orsacrificing any of the advantages of the invention, as defined in theappended claims.

Having thus described my invention, what I claim is:

In a door lock of the class described, a casing, a locking bolt slidablymounted therein and comprising a body provided in one edge With a pairof longitudinally spaced sockets and in its other edge with a recessadapted to receive the bit of a key, a spring to normally hold thelocking bolt in projected position, and a spring pressed locking devicemounted for vertical adjustment above the body of the locking bolt andhaving a depending portion adapted to engage either of the sockets inthe upper edge thereof to lock the bolt in either projected or retractedposition, and a portion adapted to be engaged by the bit of a keywhereby the locking device may be disengaged With either of said socketsby means of a key.

In testimony whereof I have hereunto set my hand in presence of tivosubscribing Witmesses.

FRANK SOLYWODA. lVitnesses IGNACZY Dnnznii, VILLLAM A. GLnEsoN.

